Apparatus and methods of handling simultaneous universal terrestrial radio access network radio resource control procedures with activation times in universal mobile telecommunications system user equipment

ABSTRACT

The details of an apparatus and methods of handling simultaneous universal terrestrial radio access network radio resource control procedures with activation times in a universal mobile telecommunications system user equipment are disclosed herein. According to one aspect, the apparatus includes a message handler to receive a received message from the UTRAN, a sequential processor to receive an ongoing command, a command store connected to the message handler to save the received command. The message handler determines if there is an existing command at the user equipment such that the user equipment appears to the UTRAN as though it were processing the select commands simultaneously while actually processing the existing command sequentially. According to another aspect, the method includes the steps of: determining if there is an existing command at the user equipment; and if there is an existing command at the user equipment, processing the existing command prior to processing any received commands such that the user equipment appears to be processing commands simultaneously. According to a third aspect, the method includes the steps of: determining the current time (T); and determining that the first activation time (T 1 ) comes after the second activation time (T 2 ) if (T&lt;T 1 ) XOR (T&lt;T 2 ) XOR (T 2 &lt;T 1 ).

CROSSREFERENCE TO RELATED APPLICATION

N/A

BACKGROUND

1. Technical Field

This application relates to UMTS (Universal Mobile TelecommunicationsSystem) in general, and to an apparatus and methods of handlingsimultaneous universal terrestrial radio access network radio resourcecontrol procedures with activation times in a universal mobiletelecommunications system user equipment in particular.

2. Description of the Related Art

UMTS is a third generation public land mobile telecommunication system.Various standardization bodies are known to publish and set standardsfor UMTS, each in their respective areas of competence. For instance,the 3GPP (Third Generation Partnership Project) has been known topublish and set standards for GSM (Global System for MobileCommunications) based UMTS, whereas and the 3GPP2 (Third GenerationPartnership Project 2) has been known to publish and set standards forCDMA (Code Division Multiple Access) based UMTS. Within the scope of aparticular standardization body, specific partners publish and setstandards in their respective areas.

Standard document ETSI TS 125 331 v3.10.0 (2002–03) addresses thesubject of UMTS RRC (Radio Resource Control) protocol requirementsbetween UTRAN (Universal Terrestrial Access Network) and UE (UserEquipment). Although ETSI TS 125 331 specifies the requirement that theUE shall be able to process several RRC procedures, the document may notaddress how to meet the requirements for handling simultaneous RRCprocedures in particular.

Consider a wireless mobile device, also known as user equipment (UE),which complies with the ETSI specifications for the UMTS protocol. TheETSI specification for the RRC layer of the UE, ETSI TS 125 331 v3.10.0(2002–03), states in section 8 as quoted:

“The UE shall be able to process several simultaneous RRC procedures.After the reception of a message which invoked a procedure, the UE shallbe prepared to receive and act on another message which may invoke asecond procedure.”

Most RRC procedures are initiated upon receiving a command from theUTRAN and most procedures end after the UE has sent a response messageback to the UTRAN. Often the procedure extends to include receiving anacknowledgement of the response message from the UTRAN, but not always.This behaviour is detailed in TS 125.331 for each individual procedure.Although it may not be possible to genuinely handle UTRAN commandssimultaneously without the use of multiple processors, there is a needfor a solution that can be practiced using a single processor.

SUMMARY

The details of an apparatus and methods of handling simultaneousuniversal terrestrial radio access network radio resource controlprocedures with activation times in a universal mobiletelecommunications system user equipment disclosed herein may enable UE(User Equipment) to handle simultaneous UTRAN procedures generally, andto handle simultaneous UTRAN procedures with activation times inparticular.

In order to comply with the requirements of the 3GPP RRC specificationthe UE provided in accordance with the apparatus and method of thepresent application advantageously appears to the UTRAN as if the UE isprocessing all procedures simultaneously even though the UE is mostlyhandling procedures sequentially.

It is an object of the present application that an apparatus and methodsof handling simultaneous universal terrestrial radio access networkradio resource control procedures with activation times in a universalmobile telecommunications system user equipment is provided at a UEhaving a simultaneous message handling core stack for the core network,such as the NAS (Non-Access Stratum), and one or more access networkstacks of the access networks, such as the AS (Access-Stratum), therebyensuring that the UE appears to the UTRAN as if the UE is processing allprocedures simultaneously while the UE is enabled to handle proceduressequentially.

According to one aspect of the present application, there is provided auser equipment apparatus adapted to receive messages from a UTRAN,select messages having a select command, each command having anactivation time for invoking an RRC procedure at the user equipment, theapparatus comprising: a message handler to receive a received messagefrom the UTRAN, the received message having a received command, saidmessage handler capable of extracting the received command from thereceived message thereby providing a received activation time and areceived RRC procedure reference; a sequential processor to receive anongoing command having an ongoing activation time for invoking anongoing RRC procedure, said sequential processor capable of invoking theongoing RRC procedure at the ongoing activation time; a command storeconnected to the message handler to save the received command, saidcommand store capable of storing the received command thereby providinga saved activation time and a saved RRC procedure reference; whereinsaid message handler is coupled to said command store and is coupled tosaid sequential processor to save and process commands respectively, andto determine if there is an existing command at the user equipment, theexisting command being one of the saved command and the ongoing command,such that the user equipment appears to the UTRAN as though it wereprocessing the select commands simultaneously while actually processingthe existing command sequentially.

According to another aspect of the present application, there isprovided a method of processing simultaneous commands at a userequipment, the simultaneous commands sent from a UTRAN to the userequipment, the method comprising the steps of: (a) determining if thereis an existing command at the user equipment; and (b) if there is anexisting command at the user equipment, processing the existing commandprior to processing any received commands such that the user equipmentappears to be processing commands simultaneously.

According to yet another aspect of the present application, there isprovided a method of comparing a first activation time to a secondactivation time at a user equipment, the method comprising the steps of:(a) determining the current time (T); and (b) determining that the firstactivation time (T1) comes after the second activation time (T2) if(T<T1) XOR (T<T2) XOR (T2<T1).

Other aspects and features of the present application will becomeapparent to those ordinarily skilled in the art upon review of thefollowing description of specific embodiments of an apparatus andmethods of handling simultaneous universal terrestrial radio accessnetwork radio resource control procedures with activation times in auniversal mobile telecommunications system user equipment in conjunctionwith the accompanying figures.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the present application will now be described, by way ofexample only, with reference to the attached figures, wherein:

FIG. 1 is a block diagram illustrating an embodiment of a protocol stackapparatus provided with a simultaneous handling RRC block, in accordancewith the present application;

FIG. 2 is a block diagram illustrating in greater detail thesimultaneous handling RRC block of FIG. 1;

FIG. 3 is a first interaction diagram illustrating simultaneousprocedure handling, in accordance with the present application;

FIG. 4 is a second interaction diagram illustrating simultaneousprocedure handling, in accordance with the present application;

FIG. 5 is a flowchart illustrating an embodiment of a method ofsimultaneous procedure handling in accordance with the presentapplication;

FIG. 6 is a flowchart illustrating an embodiment of an activation timevalue comparison method, provided in accordance with the presentapplication; and

FIG. 7 is a block diagram illustrating a mobile device, which can act asa UE and co-operate with the apparatus and methods of FIGS. 1 to 6.

Same reference numerals are used in different figures to denote similarelements.

DETAILED DESCRIPTION OF THE DRAWINGS

Referring to the drawings, FIG. 1 is a block diagram illustrating anembodiment of a protocol stack apparatus provided with a simultaneoushandling RRC block, in accordance with the present application.

The SH RRC block (Simultaneous Handling RRC) 200 is a sub layer of radiointerface Layer 3 130 of a UMTS protocol stack 100. The SH RRC 200exists in the control plane only and provides information transferservice to the non-access stratum NAS 134. The SH RRC 200 is responsiblefor controlling the configuration of radio interface Layer 1 110 andLayer 2 120. When the UTRAN wishes to change the UE configuration itwill issue a message to the UE containing a command to invoke a specificRRC procedure. The SH RRC 200 layer of the UE decodes this message andinitiates the appropriate RRC procedure. Generally when the procedurehas been completed (either successfully or not) then the SH RRC sends aresponse message to the UTRAN (via the lower layers) informing the UTRANof the outcome. Although it should be noted that there are a fewscenarios where the SH RRC will not issue a response message to theUTRAN, in those cases the SH RRC need not and does not reply.

Advantageously, The SH RRC block 200 allows the protocol stack 100 to beseen as processing the UTRAN command procedures simultaneously whileenabling the protocol stack 100 to process UTRAN command proceduressequentially.

Turning now to FIG. 2, FIG. 2 is a block diagram illustrating in greaterdetail the simultaneous handling RRC block of FIG. 1. UTRAN 210 sendsmessages with simultaneous procedures 215 to the UE 220. UE 220 isprovided with a receiver 212, and a transmitter 214 in order to receivethe messages 215, and to respond to the UTRAN for those messages where aresponse is applicable. UE 220 is also provided with a simultaneoushandling RRC block 200, which is connected to receive messages fromUTRAN 210 via receiver 212, and which is connected to send responses toUTRAN 210 via transmitter 214. The connections between receiver 212 andsimultaneous handling RRC 200, and between simultaneous handling RRC andtransmitter 214 may involve blocks that are not expressly shown in FIG.2, such as for example the protocol stack blocks of FIG. 1.

The simultaneous handling RRC block 200, is provided with a messagehandler 240, a sequential processor 238, a time comparator 250, acommand store 260, an acknowledger 270 and a rejector 280.

Depending on the current state of simultaneous message handling RRCblock 200, there may or may not be ongoing or saved commands 245, alsoreferred to hereinafter as existing commands, in the SH RRC 200. As usedin this description and in the appended claims, the term command isdefined to mean either a procedure that was invoked from a message, or amessage that includes an invocation to a procedure. For example, therewould be no existing commands at the SH RRC if the sequential processorhad no ongoing procedures and the command store had no saved messages.Conversely, it can be said that there are existing commands at the SHRRC if the sequential processor is processing an ongoing procedure,and/or if the command store had a saved message. It is envisaged thatsequential processor 238 processes commands, i.e. either messages orprocedures. Similarly, it is envisaged that command store 260 savesprocedures, i.e. either procedures or messages.

The message handler 240 is connected to the receiver 212. Messagehandler 240 is capable of determining if there are any ongoing or savedcommands 245, i.e. existing commands that exist in simultaneous handlingRRC 200. If there are no existing commands, then sequential processor238 processes received UTRAN commands in sequence. However, if messagehandler 240 determines that there is an existing command, for instancebecause sequential processor 238 is busy processing a previouslyreceived command, then message handler 240 routes the received commandto the time comparator block 250, which proceeds to compare theactivation time of the existing command with the activation time of thereceived command. If the activation time of the received command islater than the activation time of the existing command, then the commandstore block 260 saves the received command so that it can be processedafter the existing command has completed processing. On the other hand,if the activation time of the received command is not later than theactivation time of the existing command, then the rejector 280 simplyrejects the received command. Sequential processor 238 processesreceived and saved commands in sequence at the corresponding activationtimes, and depending on the outcome of the processing, either rejects aspecific message via rejector 280, or acknowledges a specific messagevia acknowledger 270. Both acknowledger 270 and rejector 280 communicatethe outcome of simultaneous message handling RRC processing to the UTRANvia transmitter 214. In the event that a command does not require aresponse, sequential processor 238 need not send either a response or arejection.

In the event that more than one existing command exists at the SH RRC200, it is envisaged that the latest activation time for the existingcommands be used by the time comparator 250 when comparing the receivedactivation time to the existing activation time.

Advantageously, the apparatus of FIG. 2 enables the UE to process UTRANprocedures sequentially while the UTRAN sees the UE processing the UTRANprocedures simultaneously.

Turning now to FIG. 3, FIG. 3 is a first interaction diagramillustrating simultaneous procedure handling, in accordance with thepresent application. UTRAN 310 sends a first message, ‘message 1’ 315having activation time ‘ACT1’ 317 to UE 320, and then sends a secondmessage, ‘message 2’ 325, having activation time ‘ACT2>ACT 1’ 327 to UE320. The activation time of ‘message 2’ 325 is later than the activationtime of ‘message 1’. Therefore, upon reception of ‘message 2’ 327, UE320 saves ‘message 2’ at step 330, activates ‘message 1’ at step 340 attime T=ACT1 337, and sends ‘response to message 1’ 345 back to UTRAN310. However, since UE 320 advantageously has ‘saved message 2’ 335, ata time after ‘ACT1’ but before ‘ACT2’, the UE 320 proceeds to process‘saved message 2’ as if it was just received from UTRAN 310. The resultis that ‘message 2’ activates at step 350 at T=ACT2, and UE 320 sends‘response to message 2’ 355 so that from the point of view of the UTRAN310 the UE is handling simultaneous procedures. Note that eitherresponse may be an acknowledgement or a rejection if, for example, themessages cannot be processed for other reasons other than those whichconcern activation time. Although not expressly shown in FIG. 3, ifeither message did not require a response, the UE would not send one.

Turning now to FIG. 4, FIG. 4 is a second interaction diagramillustrating simultaneous procedure handling, in accordance with thepresent application. UTRAN 410 sends a first message, ‘message 1’ 415having activation time ‘ACT1’ 417 to UE 420, and then sends a secondmessage, ‘message 2’ 425, having activation time ‘ACT2<=ACT 1’ 427 to UE420. The activation time of ‘message 2’ 425 is earlier or equal to theactivation time of ‘message 1’. Therefore, upon reception of ‘message 2’427, UE 420 sends a ‘reject message 2’ 435 to UTRAN 410. At time T=ACT2437, UE 420 need not activate ‘message 2’ as UE 420 has advantageouslyrejected ‘message 2’ 425. At T=ACT1 UE 420 activates ‘message 1’ at step450, and sends ‘response to message 1’ 455. back to UTRAN 410. Note thatthe response to message 1 may be an acknowledgement or a rejection if,for example, the message cannot be processed for other reasons otherthan those which concern activation time.

Although the term message was used in FIGS. 3 and 4, and theirdescription, it is envisaged that either procedures or commands besimultaneously handled in substantially the same manner as illustratedand described.

Turning now to FIG. 5, FIG. 5 is a flowchart illustrating an embodimentof a method of simultaneous procedure handling in accordance with thepresent application.

The UE can only process one or part of one procedure at a time,therefore, complex procedures must be broken down into intermediatesteps. Between each step the UE is in a transitional state, waiting foran event to trigger the next step in the procedure. In each of thesetransitional states the UE must be capable of responding to furthermessages from the UTRAN that will initiate ‘simultaneous’ procedures.Simultaneous commands are defined as those received before the UE hascompleted execution of a previous command.

Having to handle a simultaneous command with an activation time prior tothat of a command already received may require excessively complexsoftware to implement. Therefore, simultaneous commands with activationtimes before those of previous commands are rejected.

Note that, although the RRC standard may suggest that out-of-ordersimultaneous commands (with respect to activation times) should besupported by the UE, it is envisaged that this will not be implementedby many UE's due to the complexity involved so that UTRANimplementations will probably send simultaneous commands in order.

Simultaneous commands with activation times after those of the previouscommands may be queued until the lower layers have completed executionof the previous commands. In the case when the new activation time islater in time than the old existing one, the UE is able to successfullypretend to the UTRAN that it is handling the commands simultaneouslywhen in fact it is not.

The flowchart of FIG. 5 summarizes an embodiment of a method provided atthe UE in accordance with the present application. At step 510, themethod 500 begins. At step 520, a message is received from the UTRAN atthe UE. At step 530, a determination is made as to whether there is anexisting procedure that exists, i.e. ongoing or saved. If there is noexisting procedure, then the method continues at step 540 whereat a newprocedure is initiated, and the method waits for new messages at step520. However, if there is an existing procedure, then the methodcontinues at step 550 whereat the method examines the contents of themessage received at step 520, after which at step 560 it is determinedwhether the new activation time examined at step 550 is before the oldactivation time of the existing procedure determined at step 530. If thenew activation time is before the old activation time, then the methodcontinues at step 570 whereat the new message is rejected and the methodreturns to step 520 in order to wait for new messages. However, if thenew activation time is not before the old activation time, then themethod continues at step 580 whereat the new message is saved until theold message completes, after which the saved message becomes ongoing,and the method continues at step 520 to wait for new messages.

UMTS activation times specify the moment when the UE should reconfigureits communication channels. These are expressed in terms of a CFN numberthat can range from 0 to 255. The CFN number increments at every TTI.After reaching 255, the CFN number ‘wraps-around’ to 0, and continuesincrementing from there. Because of this wrap-around, it is difficult tocompare two activation times to determine which comes first. CFNs aredescribed in 3GPP document TS 25.402 “Synchronization in UTRAN; Stage2”. The flowchart of FIG. 6 is a definitive way to compare twoactivation times, taking into account the wrap around requirement, whichis left as an implementation specific detail by the relevant ETSIstandards.

Turning now to FIG. 6, FIG. 6 is a flowchart illustrating an embodimentof an activation time value comparison method, provided in accordancewith the present application. At step 605, the method begins. At step610, the current time value nw is compared to T1. If T1 is greater thannw, then step 620 ensues, else step 630 ensues. At steps 620 and 630,the current time value nw is compared to T2. If T2 is found to begreater than nw at step 630, or if nw is found to be smaller than T2 atstep 620, then one of either T1 or T2 is wrapped and step 640 ensueswhereat T2 is compared directly to T1 to determine if T1 is greater thanT2, and if T1 is found to be greater in that comparison, then because ofwrapping the opposite result is returned at steps 650 and 660. However,if at step 620 it was determined that T2 is greater than the currenttime value nw, or if at step 630 the converse was determined, then step690 ensues because in the first case none of T1 and T2 were wrapped so adirect comparison is correct, and in the second case because both T1 andT2 were wrapped, then step 690 ensues whereat T1 can be compareddirectly to T2 to determine if T1 is greater than T2, and if T1 is foundto be greater in that comparison, then because both T1 and T2 are in thesame wrapped state, the direct result is returned at steps 670 and 680.

The UE may assume various states (these are described in 25–331 clause7.2). One of the duties of the RRC is to keep track of the state of theUE. In some states shared or common channels are used for communicationwith the UTRAN. In cell_DCH state channels dedicated to the UE are used.However, entry to cell_DCH requires synchronization to be achieved. Allthese states, require different Radio Bearer configurations and theseare contained in commands received from the UTRAN. In normal operationmany UE state transitions are required.

The RRC may need to compare the Activation Times contained inReconfiguration commands from the UTRAN in order to maintainsynchronization of channel use and transition to the correct state atthe moment required by the UTRAN.

Adopting the following method to determine whether T1 comes after T2solves the problem:T1 comes after T2 if (now<T1) XOR (now<T2) XOR (T2<T1)

This can also be implemented by other equivalent logical expressions, orby a series of nested IF statements in a suitable programming language.

Where:

-   -   ‘now’ is the current CFN number.    -   T1 is one Activation Time    -   T2 is another Activation Time    -   XOR is the exclusive—OR Boolean operator

It is assumed:

-   -   (a) Both T1 and T2 are in the future    -   (b) Neither T1 nor T2 are more than 255 TTIs into the future

This can be implemented by the flowchart illustrated in FIG. 6, which isequivalent to the more compact form described above.

Turning now to FIG. 7, FIG. 7 is a block diagram illustrating a mobiledevice, which can act as a UE and co-operate with the apparatus andmethods of FIGS. 1 to 6, and which is an exemplary wirelesscommunication device. Mobile station 700 is preferably a two-waywireless communication device having at least voice and datacommunication capabilities. Mobile station 700 preferably has thecapability to communicate with other computer systems on the Internet.Depending on the exact functionality provided, the wireless device maybe referred to as a data messaging device, a two-way pager, a wirelesse-mail device, a cellular telephone with data messaging capabilities, awireless Internet appliance, or a data communication device, asexamples.

Where mobile station 700 is enabled for two-way communication, it willincorporate a communication subsystem 711, including both a receiver 712and a transmitter 714, as well as associated components such as one ormore, preferably embedded or internal, antenna elements 716 and 718,local oscillators (LOs) 713, and a processing module such as a digitalsignal processor (DSP) 720. As will be apparent to those skilled in thefield of communications, the particular design of the communicationsubsystem 711 will be dependent upon the communication network in whichthe device is intended to operate. For example, mobile station 700 mayinclude a communication subsystem 711 designed to operate within theMobitex™ mobile communication system, the DataTAC™ mobile communicationsystem, GPRS network, UMTS network, EDGE network.

Network access requirements will also vary depending upon the type ofnetwork 719. For example, in the Mobitex and DataTAC networks, mobilestation 700 is registered on the network using a unique identificationnumber associated with each mobile station. In UMTS and GPRS networks,however, network access is associated with a subscriber or user ofmobile station 700. A GPRS mobile station therefore requires asubscriber identity module (SIM) card in order to operate on a GPRSnetwork. Without a valid SIM card, a GPRS mobile station will not befully functional. Local or non-network communication functions, as wellas legally required functions (if any) such as “911” emergency calling,may be available, but mobile station 700 will be unable to carry out anyother functions involving communications over the network 700. The SIMinterface 744 is normally similar to a card-slot into which a SIM cardcan be inserted and ejected like a diskette or PCMCIA card. The SIM cardcan have approximately 64K of memory and hold many key configuration751, and other information 753 such as identification, and subscriberrelated information.

When required network registration or activation procedures have beencompleted, mobile station 700 may send and receive communication signalsover the network 719. Signals received by antenna 716 throughcommunication network 719 are input to receiver 712, which may performsuch common receiver functions as signal amplification, frequency downconversion, filtering, channel selection and the like, and in theexample system shown in FIG. 7, analog to digital (A/D) conversion. A/Dconversion of a received signal allows more complex communicationfunctions such as demodulation and decoding to be performed in the DSP720. In a similar manner, signals to be transmitted are processed,including modulation and encoding for example, by DSP 720 and input totransmitter 714 for digital to analog conversion, frequency upconversion, filtering, amplification and transmission over thecommunication network 719 via antenna 718. DSP 720 not only processescommunication signals, but also provides for receiver and transmittercontrol. For example, the gains applied to communication signals inreceiver 712 and transmitter 714 may be adaptively controlled throughautomatic gain control algorithms implemented in DSP 720.

Mobile station 700 preferably includes a microprocessor 738 whichcontrols the overall operation of the device. Communication functions,including at least data and voice communications, are performed throughcommunication subsystem 711. Microprocessor 738 also interacts withfurther device subsystems such as the display 722, flash memory 724,random access memory (RAM) 726, auxiliary input/output (I/O) subsystems728, serial port 730, keyboard 732, speaker 734, microphone 736, ashort-range communications subsystem 740 and any other device subsystemsgenerally designated as 742.

Some of the subsystems shown in FIG. 7 perform communication-relatedfunctions, whereas other subsystems may provide “resident” or on-devicefunctions. Notably, some subsystems, such as keyboard 732 and display722, for example, may be used for both communication-related functions,such as entering a text message for transmission over a communicationnetwork, and device-resident functions such as a calculator or tasklist.

Operating system software used by the microprocessor 738 is preferablystored in a persistent store such as flash memory 724, which may insteadbe a read-only memory (ROM) or similar storage element (not shown).Those skilled in the art will appreciate that the operating system,specific device applications, or parts thereof, may be temporarilyloaded into a volatile memory such as RAM 726. Received communicationsignals may also be stored in RAM 726.

As shown, flash memory 724 can be segregated into different areas forboth computer programs 758 and program data storage 750, 752, 754 and756. These different storage types indicate that each program canallocate a portion of flash memory 724 for their own data storagerequirements. Microprocessor 738, in addition to its operating systemfunctions, preferably enables execution of software applications on themobile station. A predetermined set of applications that control basicoperations, including at least data and voice communication applicationsfor example, will normally be installed on mobile station 700 duringmanufacturing. A preferred software application may be a personalinformation manager (PIM) application having the ability to organize andmanage data items relating to the user of the mobile station such as,but not limited to, e-mail, calendar events, voice mails, appointments,and task items. Naturally, one or more memory stores would be availableon the mobile station to facilitate storage of PIM data items. Such PIMapplication would preferably have the ability to send and receive dataitems, via the wireless network 719. In a preferred embodiment, the PIMdata items are seamlessly integrated, synchronized and updated, via thewireless network 719, with the mobile station user's corresponding dataitems stored or associated with a host computer system. Furtherapplications may also be loaded onto the mobile station 700 through thenetwork 719, an auxiliary I/O subsystem 728, serial port 730,short-range communications subsystem 740 or any other suitable subsystem742, and installed by a user in the RAM 726 or preferably a non-volatilestore (not shown) for execution by the microprocessor 738. Suchflexibility in application installation increases the functionality ofthe device and may provide enhanced on-device functions,communication-related functions, or both. For example, securecommunication applications may enable electronic commerce functions andother such financial transactions to be performed using the mobilestation 700.

In a data communication mode, a received signal such as a text messageor web page download will be processed by the communication subsystem711 and input to the microprocessor 738, which preferably furtherprocesses the received signal for output to the display 722, oralternatively to an auxiliary I/O device 728. A user of mobile station700 may also compose data items such as email messages for example,using the keyboard 732, which is preferably a complete alphanumerickeyboard or telephone-type keypad, in conjunction with the display 722and possibly an auxiliary I/O device 728. Such composed items may thenbe transmitted over a communication network through the communicationsubsystem 711.

For voice communications, overall operation of mobile station 700 issimilar, except that received signals would preferably be output to aspeaker 734 and signals for transmission would be generated by amicrophone 736. Alternative voice or audio I/O subsystems, such as avoice message recording subsystem, may also be implemented on mobilestation 700. Although voice or audio signal output is preferablyaccomplished primarily through the speaker 734, display 722 may also beused to provide an indication of the identity of a calling party, theduration of a voice call, or other voice call related information forexample.

Serial port 730 in FIG. 7, would normally be implemented in a personaldigital assistant (PDA)-type mobile station for which synchronizationwith a user's desktop computer (not shown) may be desirable, but is anoptional device component. Such a port 730 would enable a user to setpreferences through an external device or software application and wouldextend the capabilities of mobile station 700 by providing forinformation or software downloads to mobile station 700 other thanthrough a wireless communication network. The alternate download pathmay for example be used to load an encryption key onto the devicethrough a direct and thus reliable and trusted connection to therebyenable secure device communication.

Other communications subsystems 740, such as a short-rangecommunications subsystem, is a further optional component which mayprovide for communication between mobile station 700 and differentsystems or devices, which need not necessarily be similar devices. Forexample, the subsystem 740 may include an infrared device and associatedcircuits and components or a Bluetooth™ communication module to providefor communication with similarly enabled systems and devices.

When mobile device 700 is used as a UE, protocol stacks 746 include anapparatus and methods of handling simultaneous universal terrestrialradio access network radio resource control procedures with activationtimes in a universal mobile telecommunications system user equipment.

Although the terms message, procedure, and command have beenspecifically used in the above description and the accompanying figures,it is envisaged that either messages, commands, or procedures be handledsimultaneously in accordance with the apparatus and methods of thepresent application, so that these terms can be interchanged withoutchanging the scope or departing from the spirit of the presentapplication.

The above-described, embodiments of the present application are intendedto be examples only. Those of skill in the art may effect alterations,modifications and variations to the particular embodiments withoutdeparting from the scope of the application.

1. A user equipment apparatus adapted to receive messages from a UTRAN,select messages having a select command, each command having anactivation time for invoking an RRC procedure at the user equipment, theapparatus comprising: a message handler to receive a received messagefrom the UTRAN, the received message having a received command, saidmessage handler capable of extracting the received command from thereceived message thereby providing a received activation time and areceived RRC procedure reference; a sequential processor to receive anongoing command having an ongoing activation time for invoking anongoing RRC procedure, said sequential processor capable of invoking theongoing RRC procedure at the ongoing activation time; a command storeconnected to the message handler to save the received command, saidcommand store capable of storing the received command thereby providinga saved activation time and a saved RRC procedure reference; whereinsaid message handler is coupled to said command store and is coupled tosaid sequential processor to save and process commands respectively, andto determine if there is an existing command at the user equipment, theexisting command being one of the saved command and the ongoing command,such that the user equipment appears to the UTRAN as though it wereprocessing the select commands simultaneously while actually processingthe existing command sequentially.
 2. The apparatus as recited in claim1, further comprising an activation time value comparator to receive afirst activation time consisting of one of the received activation time,the saved activation time, and the ongoing activation time, and toreceive a second activation time consisting of another of the receivedactivation time, the saved activation time, and the ongoing activationtime, said activation time comparator capable of determining if thefirst activation time comes after the second activation time.
 3. Theapparatus as recited in claim 2, wherein said message handler is coupledto said activation time value comparator so that upon the determinationthat there is an existing command the received activation time iscompared to the existing activation time.
 4. The apparatus as recited inclaim 3, wherein if said message handler determines that the receivedactivation time comes after the existing activation time, then thereceived command is sent to the message store to be saved.
 5. Theapparatus as recited in claim 3, wherein if said message handlerdetermines that the received activation time does not come after theexisting activation time, then the received command is rejected.
 6. Theapparatus as recited in claim 2, further comprising a microprocessor tohandle user equipment processing.
 7. The apparatus as recited in claim6, wherein said activation value comparator invokes a compareinstruction that is executed by said microprocessor.
 8. The apparatus asrecited in claim 2, wherein the time value comparator includes means fordetermining the current time (T), and wherein the first activation time(T1) is determined to come after the second activation time (T2) if(T<T1) XOR (T<T2) XOR (T2<T1).
 9. The apparatus as recited in claim 8,wherein the current time is the current CFN number at the userequipment.
 10. The apparatus as recited in claim 9, wherein both T1 andT2 are in the future.
 11. The apparatus as recited in claim 10, whereinneither T1 nor T2 are more than 255 TTIs into the future.
 12. Theapparatus as recited in claim 1, wherein if said message handlerdetermines that there is not an ongoing command at said sequentialprocessor, then said message handler sends one of the saved message andthe received message to the sequential processor to become the ongoingmessage.
 13. The apparatus as recited in claim 1, further comprising amicroprocessor to handle user equipment processing.
 14. The apparatus asrecited in claim 13, wherein said sequential processor is provided by aprocedure that is executed by said microprocessor.
 15. The apparatus asrecited in claim 13, wherein said message handler is provided by aninterrupt service routine that is executed by said microprocessor.
 16. Auser equipment apparatus adapted to handle simultaneous messages havingactivation times for initiating RRC procedures sent from a UTRAN,comprising: a sequential processor for processing an ongoing RRCprocedure initiated at an ongoing activation time corresponding to anongoing message; a message store for saving a saved message having asaved activation time for initiating a saved RRC procedure; a messagehandler for receiving a received message having a received activationtime for initiating a received RRC procedure from the UTRAN, saidmessage handler preferably handling said received message to beprocessed by said sequential processor if no ongoing message exists andif no saved message exists such that the received message becomes theongoing message an activation time value comparator to compare theactivation times of one of the ongoing message, received message, andsaved message to an other of the ongoing message, received message andsaved message; said message handler connected to the message store,connected to the activation time comparator, and connected to thesequential processor such that upon reception of the received message,said message handler determines if there is an existing messageconsisting of one of the ongoing message and the saved message, and upondetermining that there is an existing message, said message handlercomparing the existing activation time to the received activation timeusing said activation time comparator, and upon determining that theexisting activation time is later than the received activation time,rejecting the received message.
 17. The apparatus as recited in claim16, wherein said message handler, while not receiving a message, upondetermination that there is no ongoing message at the sequentialprocessor and that there is a saved message at the message store, sendsthe saved message to the sequential processor.